流量在线监测技术在大型窄深引水渠道的应用  

Application of on-line flow monitoring technology in large narrowand deep water diversion channels

作　　者：张洁芳 吴竞博 李凯 ZHANG Jiefang;WU Jingbo;LI Kai(Hanjiang Hydrology and Water Resources Survey Bureau,Hydrology Bureau of Changjiang Water Resources Commission,Xiang-yang 441000,China)

机构地区：[1]长江水利委员会水文局汉江水文水资源勘测局,湖北襄阳441000

出　　处：《水利水电快报》2024年第10期18-22,共5页Express Water Resources & Hydropower Information

摘　　要：为解决大型窄深引水渠道引水流量实时精准监测的问题,以清泉沟水文站和陶岔水文站为例,从测验渠段选择、仪器选型、模型率定等方面分析了水平式ADCP和超声波时差法流量计在线监测技术在大型窄深引水渠道中的适用性。结果表明:清泉沟站水平式ADCP流量比测系统误差为0.3%,随机不确定度为7%;陶岔站超声波时差法流量计流量比测系统误差为-0.2%,随机不确定度为2.6%,两项在线监测技术成果可靠,精度满足相关规范要求,可用于大型窄深渠道流量在线监测,具有推广价值。In order to solve the problem of real-time and accurate monitoring of diversion flow in large narrow and deep diversion channels,taking Qingquangou Hydrology Station and Taocha Hydrology Station as an examples,the applicability of horizontal ADCP and ultrasonic time-difference flowmeter online monitoring technologies in large narrow and deep diversion channels was analyzed from the aspects of channel section selection,instrument selection and model calibration.The results showed that the system error of horizontal ADCP flow ratio measurement at Qingquangou Station was 0.3%and the random uncertainty was 7%.The system error of the flow ratio measurement of the ultrasonic time-difference flowmeter at Taocha Station was-0.2%,and the random uncertainty was 2.6%.The two on-line monitoring technologies were reliable and the accuracy can meet the requirements of relevant specifications,which can be used for on-line monitoring of the flow in large narrow and deep channels,and the research results can have a popularization value.

关 键 词：窄深引水渠道 流量精准监测 水平式ADCP 超声波时差法流量计 南水北调中线工程 

分 类 号：P332[天文地球—水文科学]